.three {
  font-size: 14px;
  font-family: PingFangSC-Regular;
  font-weight: 400;
  color: rgba(246,246,246,1);
  line-height: 20px;
  padding-top: 31px;
}
.footer-words {
  font-size: 14px;
  font-family: PingFangSC-Regular;
  font-weight: 400;
  color: rgba(153,153,153,1);
  line-height: 20px;
  padding-top: 20px;
}
.warper{
  position: relative;
  height: 380px;
}
.swiper-cus{
  height: 380px;
  width:1920px;
  margin-left: -360px;
}
.warper_content{
  width: 1200px;
  height: 380px;
  position: absolute;
  left: 50%;
  margin-left: -600px;
}

.category{
  background: rgba(246, 246, 246, 0.8);
  position: absolute;
  left: 0px;
  top: 0px;
  width: 240px;
  height: 380px;
  z-index: 2;
}
.category ul{
  padding: 0;
}
.category ul li {
  width: 100%;
  height: 54px;
  padding: 0 10px 0 20px;
  cursor: pointer;
  line-height: 54px;
  padding: 0;
}
.category ul li:hover{
  background: #0486fe;
}
.category ul li a{
  list-style: none;
  text-decoration:none;
  color: black;
  font-size: 14px;
  padding-left: 25px;
}
.open-course-card {
  width: 375px;
  margin-top:5px;
}
.yd-open-course-card_avatar {
  float: left;
  width: 80px;
  height: 102px;
  margin-right: 20px;
}
.yd-open-course-card_avatar img {
  width: 100%;
  height: 100%;
  border-radius: 4px;
}
.yd-open-course-card {
  font-family: PingFang SC;
  padding: 12px;
  box-sizing: border-box;
  border: 1px solid rgba(153, 153, 153, 0.15);
  border-radius: 8px;
  height: 143px;
  min-width: 300px;
  max-width: 385px;
  cursor: pointer;
  float: left;
  margin-right:5px;
}
.yd-open-course-card_content_teacher_tag {
  display: inline-block;
  height: 17px;
  font-weight: 600;
  font-size: 12px;
  line-height: 17px;
  color: #f4ad0b;
  background: rgba(244, 173, 11, 0.06);
  border: 0.5px solid rgba(244, 173, 11, 0.4);
  border-radius: 4px;
  padding: 2px 4px;
  margin-bottom: 10px;
}
.content-box{
  width: 1160px;
  height: 270px;
  background: white;
  border: 1px solid #f0f0f0;
  padding: 15px 0 0 15px;
}
.u-coursetitle{
  margin-left: 20px;
  height: 270px;
}
.u-coursetitle_title{
  color: #333 !important;
  font-size: 24px;
}
.join{
  margin-top: 95px;
}
.join a{
  text-decoration:none;
  cursor: pointer;
}
.hot{
  padding-left: 5px;
}
.j-do-trailer{
  color: #4AAF4F;
  font-size: 20px;
  line-height: 45px;
  width: 158px;
  height: 43px;
  text-align: center;
  vertical-align: middle;
  display: inline-block;
  border: 1px solid #4AAF4F;
  margin-left: 20px;
}

.add-pack {
  font-size: 14px;
  color: #0a9a3d;
  margin-left: 20px;
  background: url(//s.stu.126.net/res/images/ui/ui_sprite.png?1367c4a…) no-repeat -25px -227px;
  padding-left: 25px;
}

.learnbtn {
  background: #ff8000;
  color: white;
  font-size: 20px;
  line-height: 45px;
  width: 160px;
  height: 45px;
  text-align: center;
  vertical-align: middle;
  display: inline-block;
}

.m-chapterList {
  border-top: 1px solid #ddd;
  text-align: left;
  position: relative;
  padding-bottom: 1em;
}
.m-chapterList .chapter {
  margin-bottom: 10px;
}
.m-chapterList .chapterhead {
  height: 35px;
  color: #999;
  font-family: '微软雅黑';
  font-size: 14px;
  font-weight: bolder;
  padding: 0 20px;
  line-height: 35px;
  cursor: default;
  background: #fafafa;
}
.m-chapterList .chaptertitle {
  width: 62px;
  height: 35px;
  text-align: left;
}
.f-fl {
  float: left;
}

.f-thide {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  -ms-text-overflow: ellipsis;
}
.m-chapterList .chaptername {
  paddding-right: 20px;
  padding-left: 6px;
}
.m-chapterList .chaptertrailer {
  color: #fff;
  background-color: #4AAF4F;
  font-size: 12px;
  padding: 0 3px;
  font-weight: normal;
  margin-left: 15px;
}
.m-chapterList .section {
  height: 36px;
  line-height: 36px;
  padding: 0 20px;
  cursor: pointer;
  transition: background-color 0.15s ease-out;
}
.m-chapterList .section .ks {
  width: 62px;
  color: #999;
  text-align: left;
  font-size: 14px;
}
.m-chapterList .section .type-title {
  width: 30px;
  font-size: 12px;
  border: 1px solid #4AAF4F;
  color: #4AAF4F;
  height: 14px;
  line-height: 14px;
  text-align: center;
  margin-top: 10px;
  margin-right: 6px;
}
.m-chapterList .section .ksname {
  width: 450px;
  padding-left: 6px;
  color: #333;
  height: 36px;
}
.m-chapterList .section .ksjbtn {
  display: none;
  color: #10ae58;
  font-family: '微软雅黑';
}
.m-chapterList .section .ksjicon-look {
  width: 14px;
  height: 10px;
  margin: 13px 7px 0 0;
  background-position: -24px -112px;
}
.m-chapterList .section .ksinfo .kstime {
  width: 40px;
  height: 36px;
  text-align: right;
  font-size: 12px;
  color: #b7b8ba;
}

.m-chapterList .ksinfoicon {
  width: 13px;
  height: 15px;
  margin: 12px 0 0 8px;
}

.ksinfoicon {
  background: url(//s.stu.126.net/res/images/listIcons.png?0c5329f…) 9999px 9999px no-repeat;
}
.m-chapterList .section .canPreview {
  color: #4AAF4F;
  font-size: 14px;
  padding-right: 10px;
}
.u-ctit {
  height: 20px;
  padding: 15px 0 15px 15px;
  font-size: 18px;
  line-height: 19px;
  max-width: 660px;
}
.f-cb{
  height: 50px;
  background: white;
}

